Automatic filtering-machine.



PATENTED JUNE 30, 1908.

H. M. LESLIE.

AUTOMATIG FILTERING MACHINE.

APPLICATION FILED 00T.22,1907.

3 SHEETS-SHEET 1.

No. 892,275. PATENTED JUNE 30, 1908.

' H. M. LESLIE.

AUTOMATIC FILTERING MACHINE.

APPLICATION rmzn OOT. 22,1901.

' genus-sum 2.

. Q mzesse-sr N I wen- 2250? No. 892,275. PATENTED JUNE 30, 1908. H. M.LESLIE.

AUTOMATIC FILTERING MACHINE.

APPLIOATION FILED 001. 22, 1907.

3 SHEETS-SHEET 3.

HUGH MACKENZIE LESLIE, OF MARIKUPPAM, INDIA.

AUTOMATIC FILTERING-MAGHINE.

Specification of Letters Patent.

Patented June 30, 1908'.

Application filed October 22, 1907. Serial No. 398,646.

To all whom it may concern:

Be it known that I, HUGH MAoKENzIE LEsus, a subject of the King of GreatBritain, residing at Marikuppam, in the State of Mysore, Southern India,have invented certain new and useful Improvements in AutomaticFiltering-Machines, of which the following is a specification.

This invention has reference to an improved construction of machine forthe filtration of pulp and more particularly finely crushed ore or slimeunder treatment of the cyanid process of gold extraction.

This invention is novel in character and construction especially in sofar as it has a series of filters arranged in fixed positions round acentrally arranged and rotatable device (or devices) to which the pulpor slime and wash liquor is applied and thereafter automaticallydelivered by means of pipes or equivalent to the said filters. Eachfilter can be-automatically charged, washed and discharged the chargingand washing being capable also of adjustment to suit the material beingfilteredj.-

In order that my said invention may be clearly understood I havehereunto append ed, by way of illustration or example, explanatorydrawings which show one mode of construeting the apparatus.

Figure 1 is a vertical section taken on'theline X, X, Fig. 2. Fig. 2shows on the right hand side of the central line, a plan view and on,the left hand side a horizontal section taken on the line X, Y, Fig. 1.Figs. 3 to 8 are detail views showing how' a frame a is provided withvacuum and pressure pipe connections. Fig. 9 is a detail front view ofone of the chutes 3.

The same reference letters wherever repeated indicate the same parts.

In carrying out my invention I make the machine of a circular shapeand'I provide it with a series of filtering frames a arranged in acircle, each frame being provided with an axle b with which it is causedto revolve at suitable intervals by means to be hereinafter described.The frames a remain stationary unless when acted on by the aforesaidmeans. The ends of each axle b are supported in bearings 0, 0 whichlatter are supported on inner and outer bars (1, d, in a frameworkd thebars d, (1 being arranged concentricall round a centrally situated andvertical shaft e. The inner end of each axle b is provided with a tappetwheel f having four projecting prongs or teeth f.

The frames a are doubled, that is to say, they have two filteringsurfaces 9, h, and they are reversible, so that when one surface hasbeen used and the framerevcrsed the other surface is turned upwardsready for use. The frames a are made of either wood or metal or acombination of both and each side of each frame may be provided with aninterior frame i wedged or bolted in position and which is covered witha filtering medium preferably cotton or linen duck. The filter- I ingmedium is marked 9 h.

The centrally situated and vertical shaft e is supported by a footstepbearing 9' and arounc this shaft is suitably built up a circularframework (1 or other like structure which may consist of metal beams kof any desired section riveted or bolted together. Tappet arms Z, Z, areadjustably secured on the shaft e in such a position as to strike theprongs f of the tap et wheels f and so turn over or reverse the rames a.The shaft 6 is rotated by suitable gearing from a prime mover. Eachframe a has, as shown at Figs. 3 to 8 openings a a, which communicatewith passages a, 0., in a box a These boxes are fixed in position andthe passage 0. is supplied with vacuum from the mam vacuum pipe m by abranch n while the passage a is supplied with compressed air- (or waterunder pressure) from a main pipe p by the branch p. The

pipe p runs round the frame and is provided with branches p leading toeach frame.

The filtering is effected by means of vacuum from the main vacuum ipe mwhich is supported by the structure The branch pipes n are led from themain vacuum pipe m to the frames a, and each branch is provided with acontrolling valve 0. By means of its proper valve 0 the vacuum is aplied to the filter of each frame which is, for t 1e time being,uppermost and by means of the same valve when the frame is turned aboutits axis, the vacuum is shut off from this filter.

Com ressed air (or water under pressure) is 1 fitted with a controllingva ve v, the radial pipe communicating with a trough w which is dividedinto compartments 9c corresponding to the number of frames (1,. The washrings 8 are adjustable on the shaft 6 so that the wash pipes can beadjusted to suit the trough and when adjusted can be fixed by means of akey. i

From the revolving hopper q the pulp or slime is delivered by means ofthe radially extending ipey (or pipes) fitted'with a controlling va ve linto the compartments 9; of the circularly arranged trough w which isdisposed above the frames a and su ported byv means of the angle irons4. Eac compartment r of the trough w is provided at the bottom thereof,with an outlet pipe 2 which conveys the pulp into a guiding chute 3supported by angle irons 4 or the likecarriedby the structure (1 Thechutes 3 deliver the pu llp to their respective frames a.

he wash rings may be simply hollow cast iron rings placed one above theother. Any suitable number of wash pipes (a) can be screwed into theserings a second ipe is indicated by dotted lines in Fig. 1 therebymultiplying the number of washings given. Further, by using one or morerings and wash-pipes the washing can be arranged to suit the class ofore under treatment. Means may be provided for operating the vacuum andcompressed air (or water under pressure) valves automatically.

2 is a collecting trough into which the Washings run.

The modus operandi is as follows :The ulp or slime is sup liedcontinuously to the fiopper g and'runs own the ipe y into thecompartments x of the troug w filling the same one after, the other asthe hopper revolves with the vertical shaft e. 5O

From the compartments the pulp runs down into the respective chutes 3and on to the filtering cloth of each filter for the timebeing'uppermost. As the vertical shaft 6 revolves, the wash pipe tfollows the charging pipe y'and delivers Was-h liquor from the wash ringwhich is continuously supplied with water or other wash li uor throughthe hollow spindle 1 to each lter in succession so as to wash t e same.When the washing has been completed the vacuum is turned on by 'thevalve- 0 operated by hand or otherwise and dries the pulp-on each filterframe which is thereafterturned over by the action of the rojecting armsI, Z striking the ta pets f. ust as the filter frame is almost ups1 edown a puff of com ressed air (or water under pressure) is a mitted tothe frame by its compressed air branch p Simultaneously with theadmission of compressed air to the filter for the time being undermostthe filter for the time being u permost is brought into communicationWit the vacuum pipe.

It will be seen that as the pulp and wash liquor is continuouslysupplied and as the shaft continuously revolves, the filtering operationcan be carried on continuously.

Having now fully described my invention -what I claim and desire tosecure by Letters Patent is 1. A filtering machine having, incombination, ,a series of filters supported in a circle in fixedpositions, a centrally situated and rotatable pulp and wash liquorsupply, means for rotating the same and means for automaticallydelivering the pulp and the liquor to the filters.

2. A filtering machine having, in combination, a series .of double sidedfilters supported in a circle in fixed positions, a centrally situatedand rotatable pulp and Wash liqu'or supply, means for rotating the samei and means for automatically delivering the pulp and the liquor to thefilters.

3. A filtering machine having, in combination, a series of double sidedand reversible filters su ported in a circle in fixed positions, acentra y situated and rotatable pulp and wash liquor supply, means forrotating the same means for reversing the filters and means forautomatically delivering the pulp and the liquor to the filters.

4. Afiltering machine having, in combination, a series of filteringframes, each frame being double sided and having a filtering medium ateachside thereof sup orted in a circle in fixed positions, a centra ysituated and rotatable pulp and wash liquor supply,

means for rotating the same means for reversing the filtering framesandmeans for automatically delivering the pulp and the liquor to thefiltering frames.

5. A filtering maohine having, in combination, a series of double sidedand reversible filters su ported in a circle in fixed positions, acentrally situated and rotatable pulp and wash liquor supply, means forrotating the same, means-for automatically reversing the filters andmeans for automatically dellvering the ulp and the liquor to thefilters.

6. A tering machine having, in combination, a series of filterssupported in a circle in fixed positions, a'centrally situated androtatable shaft, a pulp receptacle on said shaft, a wash liquorreceptacle on said shaft, and means for automatlcally delivering thepulp and the liquor to the filters.

7. A filtering machine hav1ng,1n comb1nation, a series offilterssuppo'rted in a circle in fixed positions, a centrally situatedand rotatable shaft, a pulp hopper connected 1 hopper on the tion, aseries of filters supported in a circlein fixed positions, a centrallysituated and rotatable shaft, a hollow spindle surmounting said shaft, aliquid receptacle, a. pulp spindle, a wash ring on' the spindle andmeans for auton'iatically delivering the pulp and the liquor to thefilters.

9. A filtering machine having, in combination, a series of filterssupported in a circle in fixed positions, a centrally situated androtatable shaft, an adjustable pulp hopper connected with said shaft, aliquid receptacle, a wash ring. connected with said shaft and means forautomatically delivering the pulp and the liquor to the filters.

it). A filtering machine having, in combination, a series of filterssupported in a circle in fixed positions, a contra ly situated androtatable shaft, a pulp hopper connected with said shaft, a liquidreceptacle, an adjustable wash ring connected with said shaft and meansfor automatically delivering the pulp and the liquor to the filters.

]1.-A filtering machine having, in combination, a series of filterssupported in a circle in. fixml'positions, a centr: ly situated androtatable shaft, an adjustable pulp hopper connected with said shaft, aliquid receptacle, an adjustable wash ring connected with said. shaftand means for automatically delivering the pulp and the liquor to thefilters.

12. A filtering machine having, in combination, a series of filters sup)orted in a circle in fixed-positions, a centrally situated androtatable shaft, an adjustable pulp hopper connected with said shaft, aliquid receptacle, adjustable wash rings connected with said shaft andmeans for automatically delivering tlfe'pulp and the liquor to thefilters.

13. A filtering machine having, in combination, a series of filters suported in a circle in fixed positions, a centra ly situated and rotatableshaft, a pulp hopper connected with said shaft, a liquid receptacle, aWash ring connected with said shaft and pipes for automaticallydelivering the pulp and the liquor to the filters.

14. A filtering machine having, in combination, a series of filters su)ported in a circle in fixed positions, a centrally situated androtatable shaft, a pulp hopper connected with said shaft, a wash ringconnected with said shaft, a circular trough divided into compartments,means for discharging the compartments into the filters and means forcharging the compartments with pulp and wash liquor.

15. A filtering machine having, in combination a series of filters suported in a-circle in fixed positlons, a centre ly situated and rotatableshaft, a .pulp hopper connected with said shaft, awash ring connectedwith said shaft, a circular trough divided into compartments, chutes fordischarging the compartments into the filters, and pi )es for chargingthe compartments with pu p and wash liquor.

it. A filtering machine having, in combination, a series of double sidedfilters, a circular frame supporting same, axles for the lilters, acentrally situated and rotatable pulp and wash liquor supply, means forautomatically delivering the pulp and the liquor to the filters, andmeans for automatically reversing the filters so as to discharge thesame.

17. A filtering machine having, in combination, a series of double sidedfilters, a circular frame supporting same, axles for the filters, acentrally situated and rotatable pulp and wash liquor supply, means forautomatically delivering the pulp and theliquor td the filters, tappetson the axles, and means for striking the tappets and reversing thefilters. v

IS. A filtering machine having, in combination, a series of double sidedfilters, a circular. frame supporting same, axles for the filters, acentral and rotatable shaft, a pulp receptacle thereon, a wash devicetherein, means for automatically delivering the pulp and wash to thefilters, tappets on the axles and radial arms on the shaft for turningthe tappets.

IS). A filtering machine, having, in combination, a series of filterssup )orted in a circle in fixed positions, a centrally situated androtatable pulp and wash liquor supply, means for rotating the same,means for connecting the filters with a vacuum-creating device, meansfor supplying compressed air to the filters, and means for automaticallydelivering the pulp and the liquor to the filters.

20. A filtering machine having, in combination, a series of filterssuported in a circle in fixed positions, a central y situated androtatable pulp and wash liquor supply, means for rotating the same andmeans whereby each filter can be automatically charged, washed anddischarged.

21. A filtering machine having, in combination, a series of filters suported in a circle in fixed positions, a central y situated androtatable pulp and wash liquor supply, means for rotating the same,means whereby each filter can be automatically charged, washed anddischarged, and means for adjusting the charging and washing to suit thematerial being operated on.

22. A filtering machine having, in combination, a series of filterssupported in'a circle in fixed positions, means for automaticallycharging the filters,,means for automatically washim the filters andmeans for automatically discharging the filters.

23. A filtering machine having, in combination, a series of filters suported in a circle in fixed positions means or automatically chargingthe filters in succession, means for automatically Washing the filtersand means for automatically discharging the filters.

24. A filtering machine having, in combination, a series of filterssupported in a circle in fiiied positions, means for automaticallycharging the filters in succession, means for automatically, insuccession Washing the filters and means for automatically dischargingthe filters.

25. A filtering machine having, in combination, a series of filterssupported in a circle in fixed positions,-means for automaticallycharging the filters in succession, means for automatically, insuccession, washing the filters and means for automatically, insuccession, discharging the filters.

In testimony whereof I afliX my signature in presence of two witnesses.

HUGH MACKENZIE LESLIE.

Witnesses:

CLAUDE ALFRED MEIKLEJOHN. ALEX. S. CAMPBELL.

